fixup! Prevent author from approving their own MR

app/models/merge_request.rb

@@ -658,7 +658,7 @@ class MergeRequest < ActiveRecord::Base
 
   def approver_ids=(value)
     value.split(",").map(&:strip).each do |user_id|
-      next if user_id == author.id
+      next if author && user_id == author.id
 
       approvers.find_or_initialize_by(user_id: user_id, target_id: id)
     end

features/project/merge_requests.feature

@@ -327,7 +327,7 @@ Feature: Project Merge Requests
     And I click link "Bug NS-04"
     And I should not see merge button
     When I click link "Approve"
-    Then I should see message that merge request can be merged
+    Then I should see approved merge request "Bug NS-04"
 
   Scenario: I can not approve merge request if I am not an approver
     Given merge request 'Bug NS-04' must be approved by some user